DE102005017368A1 - Open clamping ring with screw lock - Google Patents

Abstract

An open clamping ring (14) with a screw lock is described, which serves for connecting tubes having end flanges or for attaching lids to containers or the like. This screw lock has a circumferentially extending, designed as a double spindle (1) clamping screw, the ends of which are provided with opposing threads (2, 3). These threads (2, 3) engage in threaded plates (6, 10) with a right-handed internal thread (7) or left-handed internal thread (11), wherein the threaded plates (6, 10) connected to the ends of the clamping ring (14) bearing blocks ( 15) are pivotally mounted. By pressing the double spindle (1), the ends (13) of the clamping ring (14) are uniformly pulled together or pressed apart. For this purpose, the double spindle (1) is provided with a hexagonal center part (4), so that a simple open-end wrench (23) can be used to open or close the screw lock. Furthermore, the ends of the double spindle (1) are provided with hexagon socket (5), so that an Allen wrench (22) can alternatively be used for actuating the double spindle.

Description

The The invention relates to an open clamping ring in the preamble of Patent claim 1 mentioned type.

For the connection from end flanges having tubes or for attaching lids on containers or barrels and for fixing other round device components clamping rings are often used, whereby a variety of glands is avoided.

such Clamping rings have according to the flanges of the pipes, tanks or equipment components different cross-sectional profile shapes and ensure the contraction and sealing the components together.

to Handling the open clamping rings are provided with one or more turnbuckles, which connect the free ends of the clamping rings together and this when closing contract or when opening Press apart.

A particularly simple castle execution exists from a screw extending in the circumferential direction of the clamping ring, which penetrates at right angles bent ends of the clamping ring as a cloth, and a nut sitting on the screw or on one of the lobes. This consists of screw and nut turnbuckle with be operated with a screwdriver or a wrench.

To meet higher demands bolts or rollers are provided in such a turnbuckle, which are rotatably mounted in these corresponding and provided on the clamping ring ends retaining tabs and are set by the clamping screw. Such screw locks are made DE 197 28 655 A1 known.

For clamping rings with long clamping paths are suitable turnbuckles with curved screws, such as these in DE 35 37 504 C1 are described. The curved screws run parallel to the clamping ring outer circumference. However, such locks are relatively complicated to handle, so that special tools are necessary for the screwing. Also, the closing process is still too tedious and in particular for use on the site little practice.

Out For this reason, in particular with frequently actuated clamping rings lever locks are provided, in which the clamping screw by a toggle lever or the like Lever is replaced. However, since the lever always allows only the same closing path, is such a clamping ring when using equipment components unsuitable for varying degrees. To adjust the tensioning, must this, for example, with an additional clamping screw adjustable be. Such a structure is expensive because of the significantly higher production costs. In addition, must secured such a cam lock with additional measures against self-opening become.

One Another disadvantage is that an adjustable cam lock after closing several times and open in time consuming Be re-adjusted to maintain the correct voltage.

to Connection of thin-walled sheet metal tubes with molded or attached flanges existing metal tubes be for the reasons mentioned screw locks prefers. The described problems fall with these particularly in the weight, as such clamping rings diameter up to 3 m reach can and their mounting on the ceiling of high industrial halls for the up scaffolding ladders or stages standing mechanic because of frequent limited Accessibility difficult is.

Of the The invention is therefore based on the object, one for such Applications particularly suitable clamping ring - ie a clamping ring of larger diameter with long tension paths with limited accessibility - to create that fast and safely closed or opened.

This is solved Task according to the present Invention with an open clamping ring with screw lock, the with simple tools, eg. As screwdrivers or wrenches, adjustable is and has the features specified in claim 1.

After the essential feature of the invention, a double spindle is provided as a clamping screw, the ends of which are provided with opposing threads, ie a right-hand thread and a left-hand thread, which threaded plates and threaded rollers are assigned with corresponding internal threads in the attached to the clamping ring end bearing blocks to a parallel To the clamping ring axis extending axis are pivotally mounted. To actuate this double spindle, the threaded ends are each equipped with internal multiple edge, preferably hexagon socket, in which Allen key or similar tools can be used. After another Merk times according to claim 2, the middle part of the double spindle located between the ends is furthermore designed as a multiple edge, preferably a hexagon.

These Design offers the following options and benefits.

With a double spindle equipped with left and right-hand thread will the closing or opening speed doubled. To operate this Double spindle are easily trained and manageable Tools, namely end wrench for the Middle part and Allen key for the provided at the ends inner multiple edges or open-end wrench for the middle part. This can be the clamping ring even with limited accessibility easy and quick to assemble or disassemble.

The very stable and largely unbreakable trained screw lock is inexpensive to produce.

Further Features of the clamping ring according to the invention are with the claims 3 to 11 indicated.

at the assembly of the usually supplied in the open state clamping ring Pay attention to the correct screwing direction of the double spindle. So must to close of the screw lock the double spindle at the left-hand end left and right Turned right end. Otherwise the lock will fall, yes at delivery in the open end position, apart. When using electric or pneumatic screwdrivers this can be very easily happen.

There visually barely distinguish the left-hand thread from the right-hand thread is, according to claim 3 proposed, the threaded plates and the thread rollers different to color. So you can, for example, the left-handed threaded plate or

thread roll in the surface treatment colored, preferably red.

A still safe solution is according to claim 4, according to which at least at one end of the double spindle a stop, preferably a threaded ring, is provided which firmly connected to the double spindle, preferably glued.

By the design of the bearing blocks and in these mounted threaded plates according to claim 5 friction forces are reduced, which leads to easier handling.

The proposals according to the claims 6 to 9 facilitate the assembly of the threaded plates or favor the power transmission or position securing these threaded plates.

According to claim 10 is an inventively designed Screw lock provided in which instead of the threaded plates Thread rolls are provided.

To the proposal according to claim 11 can the bearing blocks be dimensioned so that even in the fully closed state the protruding in the circumferential direction screw ends largely covered are.

Of the The invention is based on two exemplary embodiments, which are illustrated in the drawings, explained in detail.

In show the drawings:

1 perspective view of the double spindle,

2 perspective view of a threaded plate,

3 perspective view of a bearing block,

4 perspective and partially broken view of a screw lock connected to the clamping ring with the clamping ring open,

5 Representation according to 4 with closed clamping ring with indicated actuating tools,

6 Side view of a modified bearing block,

7 Section along the line VII-VII in 6 .

8th Side view of a bearing block according to a second modification,

9 perspective view of a thread roll,

10 perspective view of a bearing block according to a second embodiment of the threaded roller according to 9 .

11 perspective view of a double spindle with in the form of a cylinder ausgebil detem middle part and

12 perspective view of a half of a clamping ring connected to the screw lock according to a further embodiment.

Same Parts are with the same numbers, modified parts with numbers denoted by dash indices.

With the 1 to 3 the components essential for the screw lock according to the invention are illustrated.

The important for the invention double spindle 1 as they are in 1 is shown in FIG 1 right side a right-hand thread 2 and on the opposite side a left-hand thread 3 on. To operate this spindle is the middle part 4 designed as a solid, short hexagonal profile, which, as with 5 indicated, with an as open-end wrench 23 trained wrench is easily actuated.

In addition, in the two spindle ends Innensechskante 5 incorporated, in which, as also with 5 indicated, Allen key 22 can be used.

The threaded sections 2 and 3 the double spindle 1 Assigned are threaded plates with matching right-handed or left-handed internal thread. One of these two threaded plates 6 with internal thread 7 , here a right-handed internal thread, is in 2 shown. These threaded plates 6 and 10 are on both sides with round cross-section axes of rotation 9 equipped, which end with cuboid end plates 9a are completed so that between the threaded plate 6 and the endplates 9 groove 8th be formed. Thus, the threaded plates 6 and 10 pivotable about an axis parallel to the clamping ring axis.

The threaded section 3 the spindle 1 associated threaded plate 10 as they are in the 4 and 5 is shown, is identical, but with a left-handed internal thread 11 Mistake.

These threaded plates 6 respectively. 10 are in bearing blocks 12 used, of which exemplarily in 3 in the 4 and 5 right bearing block is shown.

The one from the side walls 15 and this connecting middle bridge 18 formed bearing block 12 has a substantially U-shaped cross-section. The side walls have slot-like shaped openings 16 on, which are dimensioned such that the turned by 90 ° threaded plates 6 respectively. 10 can be inserted into this.

After rotation of the threaded plates 6 respectively. 10 in the in the 4 and 5 shown position are the laterally projecting axes of rotation 9 in the breakthroughs 16 guided, with the end plate 9a on the outside of the side walls 15 abut, so that the threaded plates 6 respectively. 10 are positionally secured in the transverse direction.

The the tension ring ends 13 facing areas, namely the tension sides of the openings 16 , are semicircular, so that the axes of rotation 9 the threaded plates 6 respectively. 10 can create positive and non-positive and rotatable.

The side walls 15 are to be dimensioned so that they can withstand the highest possible load due to the tensile force of the double spindle 1 not be deformed.

The one with the clamping ring 14 central web to be connected 18 as well as the side walls 15 are curved so that they are adapted to the clamping ring outer diameter.

In 4 is the clamping ring 14 represented with the inventively designed screw lock in the open state.

The two ends 13 of the clamping ring 14 are with storage blocks 12 according to 3 equipped with the top of the clamping rings 14 are connected by latching, welding, riveting or the like. In the bearing blocks 12 are in the basis of 3 described manner, the threaded plates 6 and 10 used, whereupon in their internal thread 7 and 11 the right and left hand threads 2 . 3 having ends of the double spindle 1 are screwed so that only a few threads in through the side walls 15 limited interior of the bearing blocks 12 protrude.

With 5 is the same arrangement as in 4 shown, but in the closed state of the screw lock. The ends 13 of the clamping ring 14 lie frontally together. The threaded sections 2 and 3 the double spindle 1 are completely in the threaded plates 6 respectively. 10 screwed in, however, are still largely protected in the sidewalls 15 limited interior of the bearing blocks 12 , Their protruding ends are with the double arrow 24 which simultaneously illustrates the maximum tensioning path. As far as longer clamping distances are required, correspondingly longer double spindles are required 1 to use.

The operation of the screw lock are simple hand tools, namely alternatively a fork wrench 23 , which on the trained as a hexagon middle part 4 is to be set, or Allen key 22 , which alternatively in the hexagon socket 5 on the in 5 right or left side of the double spindle 1 can be used.

Thus, the screw lock can be operated even in the most unfavorable mounting situations, namely from three sides. A very fast operation is by means of the Allen key 22 possible, which are advantageously clamped in the form of so-called bits in an electric or pneumatic screwdriver.

The fork wrench to be placed from the front 23 In particular, it can also be used when extremely high torques are required, for example, in the case of rusty locks.

Another advantage of the screw lock according to the invention is that it is because of the right and left hand thread 2 and 3 provided double spindle 1 double closing and opening speed possible. This is especially important for long closing distances, especially when the closing drive is done manually, important.

Since the entire closing path is divided into two halves, the screw ends stand 19 even when closed not so far off, as is the case with screw locks with single-spindle screws. In general, the ends are 19 between the side walls 15 the bearing blocks 12 protected, which leads to the reduction of the security risk.

The particular based on 3 explained design of the bearing blocks 12 enables a very stable, heavy-duty design. Because the side walls 15 only relatively small breakthroughs 16 for receiving the threaded plates 6 and 10 have, these are much more stable than the locks in conventional screw, as z. In DE 197 28 655 used eyelets or hooks. This means smaller dimensions of the bearing blocks 12 possible, which leads to a significant material savings.

During assembly of the clamping ring 14 , which is dimensioned such that in the de-energized state its outer diameter is slightly larger than the outer diameter of the end flanges to be joined, this is to be widened by means of the screw lock against the effect of residual stress so that it can be pushed over the flanges to thereafter of the screw lock to be contracted.

To make this possible, the backward migration of the threaded plates 6 be prevented against the pulling direction.

For this purpose, as in the 6 and 7 shown below the breakthroughs 16 nose 20 cut out and pressed in, which are the threaded plates 6 support so that they are not backwards, so in the 6 and 7 to the right, you can hike.

Another possibility is with the modification according to 8th illustrated. Here are the in the sidewalls 15 provided openings with respect to the top of the central web 18 so inclined that their distance to the central pier 18 reduced against the clamping direction. This has the consequence that the threaded plate 6 with its bottom in one in 8th shifted to the right position on the central bridge 18 is hindered and thus prevented from further retraining.

With the 9 and 10 is another variant of the bearing blocks 12 ' illustrated. Instead of approximately cuboid threaded plates 6 respectively. 10 is a thread roll 21 with a right-handed or left-handed internal thread 7 ' intended.

For receiving and storing this thread roller 21 are the side walls 15 ' of the bearing block 12 ' with the cross section of the thread roll 21 according to circular breakthroughs 16 ' Mistake. Also the thread rolls 21 have rotary axes at both ends 9 ' on which end by end plates 9a ' are limited so that they have an annular groove 8th' forms.

After inserting the thread roll 21 in the circular breakthroughs 16 ' the side walls 15 ' grab the edge areas of the openings adjacent the clamping ring ends 16 ' under tensile load in the grooves 8th' thread rolling 21 one.

Instead of threaded rollers with annular grooves 8th' also cylindrical thread rolls without ring grooves, so smooth rolls, can be used, since with closed screw lock the thread rolls 21 in the circular breakthroughs 16 ' be held positively.

The most universal screw lock according to the present invention, as it is mainly in 5 is shown, has a double spindle with a trained like a hexagon middle part.

As far as an operation of the screw lock with a wrench is not absolutely necessary, is also in 11 illustrated double spindle 1' suitable that a cylindrical middle part 25 has.

With 12 is finally a measure for securing the double spindle 1' illustrated. This has at its left end a stop ring 26 , which is screwed onto the outermost end and firmly connected to this, preferably glued. This ring, located in the end position of the open screw lock on the outside of the threaded plate 10 applies, prevents the double spindle 1' is completely unscrewed from the threaded plates and thus the screw lock disintegrates into its individual parts.

1, 1'

Twospindle

2

right-hand thread (Outside)

3

left-hand thread (Outside)

4

midsection (Hexagonal)

5

Allen

6

threaded plate

7, 7 '

right-handed internal thread

8th, 8th'

groove

9 9 '

axis of rotation

10

threaded plate

11

left-handed internal thread

12 12 '

bearing blocks

13

The End

14

clamping ring

15 15 '

side walls

16 16 '

breakthrough

17

tension side the breakthrough

18

center web

19

screw ends

20

nose

21

thread roll

22

Allen key

23

end wrench

24

Tension

25

cylindrical midsection

26

threaded ring

Claims (11)

Open clamping ring for connecting end flanges having tubes or for attaching lids to containers o. The like., The ends of which are connected by a screw lock, wherein the screw lock has a circumferentially extending clamping screw which passes through the clamping ring provided, radially projecting bearing blocks , wherein at least one of the bearing blocks is provided with a clamping screw receiving the thread and the clamping screw is adjustable by means of a wrench and wherein the clamping ring to change its diameter is elastically deformable, characterized in that the clamping screw as a double spindle ( 1 ) whose ends are provided with counter-rotating threads ( 2 . 3 ) and inner multiple edge, preferably hexagonal edge ( 5 ), and that in both bearing blocks ( 15 . 15 ' ) Threaded plates ( 6 . 10 ) or thread rolling ( 21 ) with counter-rotating internal threads ( 7 . 11 ; 7 ' ) are used, which are each pivotable about an axis parallel to the clamping ring axis extending. Clamping ring according to claim 1, characterized in that the double spindle ( 1 ) as a Mehrfachkant, preferably hexagon formed middle part ( 4 ) having. Clamping ring according to claim 1 or 2, characterized in that the threaded plates ( 6 . 10 ) or thread rolling ( 21 ) are colored differently. Clamping ring according to claim 1, 2 or 3, characterized in that at least one end of the double spindle 1' with a stop, preferably a glued threaded ring ( 26 ) is secured. Clamping ring according to claim 1 to 4, characterized in that the bearing blocks ( 12 . 12 ' ) radially projecting side walls ( 15 . 15 ' ), which with each other and with the clamping ring ( 14 ) via a central web ( 18 ) and respective breakthroughs ( 16 . 16 ' ) in which the threaded plates ( 6 )respectively. Thread rolling ( 21 ) with laterally projecting axes of rotation ( 9 . 9 ' ) are pivotally mounted. Clamping ring according to claim 5, characterized in that the openings ( 16 ) of the side walls ( 15 ) are elongated, that the diameter of the axes of rotation ( 9 ) the height of the breakthroughs ( 16 ) and the length of the axes of rotation ( 9 ) the strength of the side walls ( 15 ) and at the ends of the axes of rotation ( 9 ) End plates ( 9a ) whose length is greater than the diameter of the axes of rotation ( 9 ), but smaller than the length of the breakthroughs ( 16 ). Clamping ring according to claim 6, characterized in that the end ( 13 ) of the clamping ring ( 14 ) facing side of the openings ( 16 ) semicircular with a radius of rotation axes ( 9 ) corresponding radius is formed. Clamping ring according to claim 6 or 7, characterized in that the side walls ( 15 ) near the breakthroughs ( 16 ) Noses ( 20 ), on which the mounted threaded plates ( 6 . 10 ) are supported in the circumferential direction. Clamping ring according to claim 6 or 7, characterized in that the openings ( 16 ) in relation to the middle bridge ( 18 ) are inclined so that the end plates ( 9a ) when moving against the clamping direction at the top of the central webs ( 18 ) and thereby blocked. Clamping ring according to claim 1, characterized in that the openings ( 16 ' ) are circular, in which thread rolls ( 21 ) with internal threads ( 7 ' ) are rotatably mounted. Clamping ring according to one of claims 1-10, characterized in that the length of the side walls ( 15 ) is dimensioned so that their limited interior space of the bearing block ( 12 ) the ends of the double spindle ( 1 ) also in the contracted state of the clamping ring ( 14 ) largely absorbs.